Loaded silk and process of loading the silk.



l 1 iT %TTTE% PATTI @FFTQE.

IGNATZ KREIDL,.OF VIENNA, AUSTRIA-HUNGARY.

LOADED SILK AND PROCESS OF LOADING THE SILK.

No Drawing.

To all whom it may concern:

Be it known that I, IGNATZ KREIDL, chemist-manufacturer, a subject ofthe Emperor of Austria-Hungary. and a resident of XXI/l Kohlgasse T,Vienna, in the Empire of Austria-Hungary. have invented Tmprovements inLoaded Silk and Process of Loading the Silk; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appcrtains tomake and use the same.

This invention relates to the loading of silk.

It has hitherto been the practice to load silk by saturating it withmetallic salt solutions. preferably chlorid of tin solutions, and thento wash it. The metallic salt fixed on the fiber and which, as such ischiefly harmful on account of its acidity, is then transformed into theless harmful phosphate by sodium phosphate. The salts formed during thetransformation must be completcly washed out, as their presence isharmful to the silk and might possibly render it useless. The washing isa protracted operation, as it has to be repeated several times and isdetrimental to the strength and elasticity of the silk.

The object of the present invention is to provide a process for theloading of silk wherein the formation or use of injurious salts isavoided, to provide a simplified process and one wherein asuperiorproduct is obtained. According to the present invention,- this isachieved by the use of col- I loidal metallic hydrates (sol) insolution,

for instance, water solution, and more particularly those of zirconiumand other rare earth metals or mixtures of such solutions, in place ofthe metallic salt solutions.

Examples of hydrates of rare earth metals other than zirconi'um whichmay be used are those of the metals of the groups of the cerite andytterite earths, and of the group of the thorium earths, particularlythe salts of the representatives of these groups which are found inGroup IV of the periodic arrangement. Cerium hydrate is howeverpreferably not employed alone, but mixed with other hydrates. Thesehydrates have in common a high atomic weight and a strong tendency tocolloidal formation. These solutions, in which the electrolyte possiblystill adhering is only present in very small quantities, ofier theadvantage Specification of Letters Patent.

Application filed May 27, 1910.

Patented Feb. 29, lltldfi.

Serial No. 563,776.

for which purpose only small quantities of the coagulating medium needbe used.

A subsequent treatment such as washing can be dispensed with" in thisprocess, as bodies which are not harmful to the silk may be used ascoagulating media.

In carrying the loading process into eilect the silk is dipped into abath consisting of a colloidal metallic hydrate solution, preferably ofzirconium. The concentration of the bath depends upon the degree ofloading desired, and the fixing of the colloidal metallic hydrate on thefiber takes place in the bath. The dipping and therefore the fixing ofthe colloidal metallic hydrate is repeated until the desired loading isobtained.

That part of the metallic hydrate solution not absorbed by the fiber caneither be washed out with water or simultaneously transformed into geland fixed on the fiber with the absorbed sol by a coagulating medium 6.g. sodium phosphate.

' What I claim as my invention and desire to secure by Letters Patentis:

1. In the loading of silk, the process which consists in saturating thesilk with a colloidal metallic hydrate solution, the hydrate being onewhich is readily absorbed by the silk, and which does not readily attackthe silk, and the metal constituent having a high atomic weight.

2. In the loading of silk, the process which consists in saturating thesilk with a solution of mixed colloidal metallic hydrates, the hydratesbeing those which are readily absorbed by the silk, and which do notreadily attack the silk, and the metal constituent having a high atomicweight.

3. In the loading of silk, the process which consists in saturating thesilk with a colloidal hydrate solution of a rare earth metal, thehydrate being one which is readily absorbed by the silk, and which doesnot read ily attack the silk, and the metal constituent having a highatomic weight.

4:. In the loading of silk, the process which consists in saturating thesilk with a solution of mixed colloidal hydrates of the rare earthmetals, the hydrates being those which are readily absorbed by the silk,and which do not readily attack the silk, and the metal constituenthaving a high atomic weight.

5. In the loading of silk, the process which consists in saturating thesilk with a colloidal solution of zirconium hydrate.

6. In the loading of silk, the process which consists in saturating thesilk with a colloidal metallic hydrate solution and transforming the solinto gel, the hydrate being one which is readily absorbed by the silk,and which does not readily attack the silk, and the metal constituenthaving a high atomic weight.

7. In the loading of silk, the process which consists in saturating thesilk with a solution of mixed colloidal metallic hydrates andtransforming the sol into gel, the hydrates being those which arereadily absorbed by the silk,

having a high atomic weight.

8. In the loading of silk, the process which consists in saturating thesilk with -a colloidal hydrate solution of a rare earth metal andtransforming the sol into gel, the hydrate being one which is readilyabsorbed by the silk, and which does not readily attack the silk, andthe metal constituent having a high atomic weight.

9. In the loading of silk, theprocess which consists in saturating thesilkwith a solution of mixed colloidal hydrates of the rare earthmetals, and transforming sol into gel, the hydrates being those whichare readily absorbed by the silk, and which do Copies of this patent maybe obtained for five cents each, by addressing the and which do notreadily attack the silk, and the metal constituent not readily attackthe silk, and the metal constituent having a high atomic weight.

10. In the loading of silk, the process which consists in saturating thesilk with a colloidal hydrate solution of zirconium and transforming thesol into gel.

11. As a new article of manufacture, silk loaded with a colloidalhydrate of a rare earth metal, the hydrate being one which is readilyabsorbed by the silk, and which does not readily attack the silk, andthe metal constituent having a high atomic weight.

12. As a new article of manufacture, silk loaded with colloidal metallichydrate in the form of gel, the hydrate being one which is readilyabsorbed by the silk, and which does not readily attack the silk, andthe metal constituent having a high atomic weight.

13. As a new article of manufacture, silk loaded with a mixture ofcolloidal hydrates of the rare earth metals, the hydrates being thosewhich are readily absorbed by the silk, and which do not readily attackthe silk,

and the metal constituent having ahigh.

atomic weight 14. As a new article of manufacture, silk loaded with a.colloidal hydrate of zirconium.

15. As a new article loaded with a colloidal a rare earth metal in theform of gel, the hydrate being one which is readily absorbed by thesilk. and which does not readily attack the silk, and the metalconstituent having a high atomic weight.

16. As a new article .of manufacture, silk loaded with a colloidalhydrate of zirconium in the form of a gel.

In testimony whereof I name to this specification.

DR- IGNATZ KREIDL.

of manufacture, silk Commissioner of Patents.

Washington, D. G.

metallic hydrate of have signed my

